fix(fetch-favicon): no longer default to ico

Author: aster-void

src/lib/fetch-favicon.ts

@@ -48,12 +48,17 @@ export async function fetchFavicon(
 
     // fetch /favicon.ico
     {
-      const faviconRes = await fetch(
-        `${new URL(siteBaseURL).origin}/favicon.ico`,
-      );
-      const contentType =
-        faviconRes.headers.get("content-type") ?? "image/vnd.microsoft.icon";
-      if (faviconRes.ok && !contentType.startsWith("text/")) {
+      const faviconUrl = `${new URL(siteBaseURL).origin}/favicon.ico`;
+      const faviconRes = await fetch(faviconUrl);
+      const contentType = faviconRes.headers.get("content-type");
+      if (!contentType)
+        console.warn(
+          `header "Content-Type" not found while fetching ${faviconUrl}`,
+        );
+      if (
+        faviconRes.ok &&
+        (contentType == null || !contentType.startsWith("text/"))
+      ) {
         return base64DataURL(
           contentType,
           Buffer.from(await faviconRes.arrayBuffer()),